#!/bin/bash -e

# TODO: Review and if possible fix shellcheck errors.
# shellcheck disable=all

# Last Update in 2024-1112

[ "${BASH_SOURCE[0]}" ] && SCRIPT_NAME="${BASH_SOURCE[0]}" || SCRIPT_NAME=$0
SCRIPT_DIR="$(cd "$(dirname "$SCRIPT_NAME")/.." && pwd -P)"

source "${SCRIPT_DIR}"/common_vars.sh
source "${SCRIPT_DIR}"/tool_kit.sh
source "${SCRIPT_DIR}"/signal_trap.sh
source "${INSTALLDIR}"/toolchain.conf
source "${INSTALLDIR}"/toolchain.env

[ ${MPI_MODE} != "intelmpi" ] && exit 0
rm -f "${BUILDDIR}/setup_intelmpi"

INTELMPI_CFLAGS=""
INTELMPI_LDFLAGS=""
INTELMPI_LIBS=""
mkdir -p "${BUILDDIR}"
cd "${BUILDDIR}"

case "${with_intelmpi}" in
    __INSTALL__)
        echo "==================== Installing Intel MPI ===================="
        report_error ${LINENO} "To install Intel MPI, please contact your system administrator."
        exit 1
        ;;
    __SYSTEM__)
        echo "==================== Finding Intel MPI from system paths ===================="
        if [ "${PACK_RUN}" = "__TRUE__" ]; then
            echo "--pack-run mode specified, skip system check"
        else
            check_command mpiexec "intelmpi" && MPIRUN="$(realpath $(command -v mpiexec))"
            if [ "${intel_classic}" = "yes" ]; then
                # if intel compiler used as classic, so as intelmpi
                export INTELMPI_CLASSIC="yes"
            fi
            if [ "${with_intel}" != "__DONTUSE__" ]; then
                if [ "${INTELMPI_CLASSIC}" = "yes" ]; then
                    check_command mpiicc "intelmpi" && MPICC="$(realpath $(command -v mpiicc))" || exit 1
                    check_command mpiicpc "intelmpi" && MPICXX="$(realpath $(command -v mpiicpc))" || exit 1
                    check_command mpiifort "intelmpi" && MPIFC="$(realpath $(command -v mpiifort))" || exit 1
                else
                    check_command mpiicx "intelmpi" && MPICC="$(realpath $(command -v mpiicx))" || exit 1
                    check_command mpiicpx "intelmpi" && MPICXX="$(realpath $(command -v mpiicpx))" || exit 1
                    if [ "${WITH_IFX}" == "yes" ]; then
                        check_command mpiifx "intelmpi" && MPIFC="$(realpath $(command -v mpiifx))" || exit 1
                    else
                        check_command mpiifort "intelmpi" && MPIFC="$(realpath $(command -v mpiifort))" || exit 1
                    fi
                fi
            else
                echo "The use of Intel MPI is only supported with the Intel compiler"
                exit 1
            fi
            MPIFORT="${MPIFC}"
            MPIF77="${MPIFC}"
            # include path is already handled by compiler wrapper scripts (can cause wrong mpi.mod with GNU Fortran)
            # add_include_from_paths INTELMPI_CFLAGS "mpi.h" $INCLUDE_PATHS
            add_lib_from_paths INTELMPI_LDFLAGS "libmpi.*" $LIB_PATHS
            check_lib -lmpi "intelmpi"
            check_lib -lmpicxx "intelmpi"
        fi
        ;;
    __DONTUSE__)
        # Nothing to do
        ;;
    *)
        echo "==================== Linking INTELMPI to user paths ===================="
        pkg_install_dir="${with_intelmpi}"
        check_dir "${pkg_install_dir}/bin"
        check_dir "${pkg_install_dir}/lib"
        check_dir "${pkg_install_dir}/include"
        check_command ${pkg_install_dir}/bin/mpiexec "intel" && MPIRUN="${pkg_install_dir}/bin/mpiexec" || exit 1
        if [ "${with_intel}" != "__DONTUSE__" ]; then
            if [ "${INTELMPI_CLASSIC}" = "yes" ]; then
                check_command ${pkg_install_dir}/bin/mpiicc "intel" && MPICC="${pkg_install_dir}/bin/mpiicc" || exit 1
                check_command ${pkg_install_dir}/bin/mpiicpc "intel" && MPICXX="${pkg_install_dir}/bin/mpiicpc" || exit 1
                check_command ${pkg_install_dir}/bin/mpiifort "intel" && MPIFC="${pkg_install_dir}/bin/mpiifort" || exit 1
            else
                check_command ${pkg_install_dir}/bin/mpiicx "intel" && MPICC="${pkg_install_dir}/bin/mpiicx" || exit 1
                check_command ${pkg_install_dir}/bin/mpiicpx "intel" && MPICXX="${pkg_install_dir}/bin/mpiicpx" || exit 1
                if [ "${WITH_IFX}" = "yes" ]; then
                    check_command ${pkg_install_dir}/bin/mpiifx "intel" && MPIFC="${pkg_install_dir}/bin/mpiifx" || exit 1
                else
                    check_command ${pkg_install_dir}/bin/mpiifort "intel" && MPIFC="${pkg_install_dir}/bin/mpiifort" || exit 1
                fi
            fi
        else
            echo "The use of Intel MPI is only supported with the Intel compiler"
            exit 1
        fi
        MPIFORT="${MPIFC}"
        MPIF77="${MPIFC}"
        # include path is already handled by compiler wrapper scripts (can cause wrong mpi.mod with GNU Fortran)
        INTELMPI_CFLAGS="-I'${pkg_install_dir}/include'"
        INTELMPI_LDFLAGS="-L'${pkg_install_dir}/lib' -Wl,-rpath,'${pkg_install_dir}/lib'"
        ;;
esac
if [ "${with_intelmpi}" != "__DONTUSE__" ]; then
    if [ "${intel_classic}" = "yes" ]; then
        I_MPI_CXX="icpc"
        I_MPI_CC="icc"
        I_MPI_FC="ifort"
    else
        I_MPI_CXX="icpx"
        I_MPI_CC="icx"
        if [ "${WITH_IFX}" = "yes" ]; then
            I_MPI_FC="ifx"
        else
            I_MPI_FC="ifort"
        fi
    fi
    INTELMPI_LIBS="-lmpi -lmpicxx"
    echo "I_MPI_CXX is ${I_MPI_CXX}"
    echo "I_MPI_CC  is ${I_MPI_CC}"
    echo "I_MPI_FC  is ${I_MPI_FC}"
    echo "MPICXX    is ${MPICXX}"
    echo "MPICC     is ${MPICC}"
    echo "MPIFC     is ${MPIFC}"
    cat << EOF > "${BUILDDIR}/setup_intelmpi"
export I_MPI_CXX="${I_MPI_CXX}"
export I_MPI_CC="${I_MPI_CC}"
export I_MPI_FC="${I_MPI_FC}"
export MPI_MODE="${MPI_MODE}"
export MPIRUN="${MPIRUN}"
export MPICC="${MPICC}"
export MPICXX="${MPICXX}"
export MPIFC="${MPIFC}"
export MPIFORT="${MPIFORT}"
export MPIF77="${MPIF77}"
export INTELMPI_CFLAGS="${INTELMPI_CFLAGS}"
export INTELMPI_LDFLAGS="${INTELMPI_LDFLAGS}"
export INTELMPI_LIBS="${INTELMPI_LIBS}"
export MPI_CFLAGS="${INTELMPI_CFLAGS}"
export MPI_LDFLAGS="${INTELMPI_LDFLAGS}"
export MPI_LIBS="${INTELMPI_LIBS}"
export CP_DFLAGS="\${CP_DFLAGS} IF_MPI(-D__parallel -D__MPI_F08|)"
export CP_CFLAGS="\${CP_CFLAGS} IF_MPI(${INTELMPI_CFLAGS}|)"
export CP_LDFLAGS="\${CP_LDFLAGS} IF_MPI(${INTELMPI_LDFLAGS}|)"
export CP_LIBS="\${CP_LIBS} IF_MPI(${INTELMPI_LIBS}|)"
EOF
    if [ "${with_intelmpi}" != "__SYSTEM__" ]; then
        cat << EOF >> "${BUILDDIR}/setup_intelmpi"
prepend_path PATH "${pkg_install_dir}/bin"
export PATH="${pkg_install_dir}/bin":\${PATH}
export LD_LIBRARY_PATH="${pkg_install_dir}/lib":\${LD_LIBRARY_PATH}
export LD_RUN_PATH="${pkg_install_dir}/lib":\${LD_RUN_PATH}
export LIBRARY_PATH="${pkg_install_dir}/lib":\${LIBRARY_PATH}
export CPATH="${pkg_install_dir}/include":\${CPATH}
EOF
    fi
    cat "${BUILDDIR}/setup_intelmpi" >> ${SETUPFILE}
fi

load "${BUILDDIR}/setup_intelmpi"
write_toolchain_env "${INSTALLDIR}"

cd "${ROOTDIR}"
report_timing "intelmpi"
